EP3783008B1 - Verfahren zur behandlung von lignin und zur herstellung einer bindemittelzusammensetzung - Google Patents
Verfahren zur behandlung von lignin und zur herstellung einer bindemittelzusammensetzung Download PDFInfo
- Publication number
- EP3783008B1 EP3783008B1 EP20199803.6A EP20199803A EP3783008B1 EP 3783008 B1 EP3783008 B1 EP 3783008B1 EP 20199803 A EP20199803 A EP 20199803A EP 3783008 B1 EP3783008 B1 EP 3783008B1
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- European Patent Office
- Prior art keywords
- composition
- value
- temperature
- lignin
- kept
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims description 217
- 229920005610 lignin Polymers 0.000 title claims description 176
- 239000011230 binding agent Substances 0.000 title claims description 70
- 238000000034 method Methods 0.000 title claims description 69
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 31
- 239000003513 alkali Chemical class 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 150000001875 compounds Chemical class 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 15
- 150000002989 phenols Chemical class 0.000 claims description 15
- 239000002023 wood Substances 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000011120 plywood Substances 0.000 claims description 8
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 229920002866 paraformaldehyde Polymers 0.000 claims description 7
- 238000009416 shuttering Methods 0.000 claims description 7
- 239000011490 mineral wool Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims description 5
- 150000001340 alkali metals Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 4
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 239000011093 chipboard Substances 0.000 claims description 3
- 239000003733 fiber-reinforced composite Substances 0.000 claims description 3
- 239000011094 fiberboard Substances 0.000 claims description 3
- 239000002783 friction material Substances 0.000 claims description 3
- 239000011491 glass wool Substances 0.000 claims description 3
- 239000011253 protective coating Substances 0.000 claims description 3
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims description 2
- 229930003836 cresol Natural products 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 51
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 15
- 230000008569 process Effects 0.000 description 11
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- 239000002028 Biomass Substances 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 7
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- 229920002488 Hemicellulose Polymers 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 6
- 150000001299 aldehydes Chemical class 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
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- 229920001568 phenolic resin Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004679 31P NMR spectroscopy Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 4
- 229910021538 borax Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 229920005611 kraft lignin Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
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- 239000004328 sodium tetraborate Substances 0.000 description 4
- 235000010339 sodium tetraborate Nutrition 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
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- 125000001931 aliphatic group Chemical group 0.000 description 3
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- HHEAADYXPMHMCT-UHFFFAOYSA-N dpph Chemical compound [O-][N+](=O)C1=CC([N+](=O)[O-])=CC([N+]([O-])=O)=C1[N]N(C=1C=CC=CC=1)C1=CC=CC=C1 HHEAADYXPMHMCT-UHFFFAOYSA-N 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
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- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 235000011187 glycerol Nutrition 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
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- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 3
- 235000013824 polyphenols Nutrition 0.000 description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
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- 239000004606 Fillers/Extenders Substances 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 230000002292 Radical scavenging effect Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical group C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
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- 238000005731 phosphitylation reaction Methods 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical compound C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 description 1
- RNKMOGIPOMVCHO-SJMVAQJGSA-N 1,3,6-trigalloyl glucose Chemical compound C([C@@H]1[C@H]([C@@H]([C@@H](O)[C@H](OC(=O)C=2C=C(O)C(O)=C(O)C=2)O1)OC(=O)C=1C=C(O)C(O)=C(O)C=1)O)OC(=O)C1=CC(O)=C(O)C(O)=C1 RNKMOGIPOMVCHO-SJMVAQJGSA-N 0.000 description 1
- WGPCXYWWBFBNSS-UHFFFAOYSA-N 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane Chemical compound CC1(C)OP(Cl)OC1(C)C WGPCXYWWBFBNSS-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 238000011993 High Performance Size Exclusion Chromatography Methods 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002535 acidifier Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 238000005571 anion exchange chromatography Methods 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
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- 229920001222 biopolymer Polymers 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
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- MJSNUBOCVAKFIJ-LNTINUHCSA-N chromium;(z)-4-oxoniumylidenepent-2-en-2-olate Chemical compound [Cr].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O MJSNUBOCVAKFIJ-LNTINUHCSA-N 0.000 description 1
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- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
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- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 1
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- ZUSSTQCWRDLYJA-UMRXKNAASA-N n-hydroxy-5-norbornene-2,3-dicarboxylic acid imide Chemical compound C([C@@H]1C=C2)[C@@H]2[C@@H]2[C@H]1C(=O)N(O)C2=O ZUSSTQCWRDLYJA-UMRXKNAASA-N 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
- C07G1/00—Lignin; Lignin derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/005—Lignin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J197/00—Adhesives based on lignin-containing materials
- C09J197/005—Lignin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
Definitions
- the invention relates to a method for treating lignin and to the use thereof for producing a binder composition as well as to different applications thereof, as recited in the appended claims.
- Lignin is a natural polymer, which can be extracted from e.g. wood.
- lignin is a natural biopolymer its use as a component in glues instead of synthetic materials has been investigated in order to come up with a more environmentally friendly adhesive composition.
- Lignin can be used for the purpose of decreasing the amount of synthetic phenol in a resin composition. Lignin has previously been used for replacing phenol during the production of lignin-phenol-formaldehyde resin.
- the currently known lignin based resins are not, however, suitable for all the applications where traditional phenolic resins are being used.
- the currently known lignin based resins are not suitable for high-pressure laminates.
- High-pressure laminates which are also known as plastic laminates, can be produced by fusing together under the influence of heat and pressure, multiple layers of paper, fabrics, or other core materials by using thermosetting resins as binders.
- the inventors have recognized a need for a method, which would result in a higher phenol replacement in the resin and thus in a more environmentally friendly binder composition having suitable properties for use in different applications such as high-pressure laminates.
- WO 2013/144454 A1 describes alkalation processes in which lignin was dispersed into a mixture of water and alkali, followed by heating the dispersion at a temperature of 50-95 °C for producing alkalated lignin; or a process wherein first water, lignin and phenol were subjected to a treatment with sulfuric acid at 135 °C, the mixture was cooled and the treatment ended resulting in phenolated lignin, and then the phenolated lignin was alkalated.
- the purpose of the invention is to provide a new type of method for treating lignin and to provide a method for producing a binder composition for different applications.
- the purpose of the invention is to provide a new binder composition and adhesive composition as well as the uses thereof.
- the method for treating lignin according to the present invention is characterized by what is presented in claim 1.
- the method for producing a binder composition according to the present invention is characterized by what is presented in claim 6.
- the binder composition obtainable by the method according to the present invention is characterized by what is presented in claim 12.
- the adhesive composition according to the present invention is characterized by what is presented in claim 13.
- the present invention relates to a method for treating lignin, which method comprises the following steps:
- the present invention further relates to a method for producing a binder composition, wherein the method comprises the following steps:
- the compound selected from the class of phenols is selected from a group consisting of phenol, cresol, resorcinol and combinations thereof. In one embodiment of the present invention the compound selected from the class of phenols is phenol.
- lignin is dissolved into a composition, which consists of water, at least one compound selected from the class of phenols, and alkali, in step a). In one embodiment of the present invention lignin is dissolved into an aqueous composition of a compound selected from the class of phenols and alkali.
- the temperature of the composition is kept, in step a), at a temperature of 65 - 80, and preferably at a temperature of 70 - 75 °C.
- step b) comprises heating the composition at a temperature, which is at least 5 °C, preferably at least 10 °C, and more preferably at least 20 °C higher than the temperature of the composition in step a).
- the composition is heated, in step b), at a temperature of 60 - 100 °C, preferably at a temperature of 70 - 95 °C, and more preferably at a temperature of 75 - 90 °C.
- step b) is carried out for allowing lignin to react with the compound selected from the class of phenols and the alkali.
- alkali is added to the composition in step b). In one embodiment of the present invention alkali is added to the composition in step a) and in step b).
- the inventors of the present invention surprisingly found out that dissolving lignin into a composition of e.g. phenol, alkali and water, at the specific temperature used, advantageously affects the time needed to dissolve lignin into the composition.
- the inventors of the present invention found out that treating lignin in accordance with step a) and step b) enables the production of a binder composition with a low pH value if desired.
- the inventors of the present invention found out that by the method of the present invention it was possible to produce a lignin based binder composition that is suitable for e.g. the production of structural wood panel products, and impregnated overlay materials.
- the inventors also found out that different types of lignin, such as dry or condensed lignin that are usually challenging and time-consuming to dissolve, could be more easily dissolved by the method according to the present invention. Also, the inventors noticed that the alkali used for activating lignin was not consumed during the step of dissolving lignin, whereby less chemical is needed thus lower the overall chemical costs.
- step b) is carried out for alkalating the lignin.
- the alkalation step results in the lignin being activated.
- the alkalation opens the macromolecular structure of lignin whereby the steric hindrances that usually disable reactive groups in lignin structures are removed. Alkalation may also add charged groups to the lignin macromolecule.
- treating lignin with the method according to the present invention activates the lignin.
- alkalated lignin e.g. for producing a binder composition
- the compatibility and reaction behavior is much better than in a normal case, where non-treated lignin has been used in the cooking or polymerizing stage of production process.
- lignin should be understood as lignin originating from any suitable lignin source.
- the lignin used can be essentially pure lignin.
- essentially pure lignin should be understood as at least 90 % pure lignin, preferably at least 95 % pure lignin.
- the essentially pure lignin comprises at most 10 %, preferably at most 5 %, of other components. Extractives and carbohydrates such as hemicelluloses can be mentioned as examples of such other components.
- the lignin contains less than 10 weight-%, preferably less than 6 weight-%, and more preferably less than 4 weight-% of carbohydrates.
- the amount of carbohydrates present in lignin can be measured by high performance anion exchange chromatography with pulsed amperometric detector (HPAE-PAD) in accordance with standard SCAN-CM 71.
- HPAE-PAD pulsed amperometric detector
- the ash percentage of lignin is less than 7.5 weight- %, preferably less than 5 weight-%, and more preferably less than 3 weight-%.
- the ash content can be determined by carbonifying and quickly burning a lignin sample so that alkali salts are not melted before the organic matter has been burned (e.g. 20 - 200 °C for 30 minutes, after which temperature is adjusted to 200 - 600 °C for 1 h, and thereafter adjusting the temperature to 600 - 700 °C for 1 hour), and finally the lignin sample is ignited at 700 °C for 1h.
- Ash content of a lignin sample refers to the mass that remains of the sample after burning and ignition, and it is presented as per cent of the sample's dry content.
- the weight average molecular weight (Mw) of lignin is 1000 - 15000 g/mol, preferably 2000 - 10000 g/mol, and more preferably 3000 - 8000 g/mol.
- the molecular weight of the lignin can be determined by using a high-performance size-exclusion chromatography in the following manner: Two parallel measurements are carried out. 0.1 M NaOH is used as an eluent. Calibration is done using Na-polystyrene sulfonate standards having a molecular weight of 1100 - 73900 g/mol. For quality control, standard quality kraft lignin and PSS molecular weight standard are used.
- the columns used are PSS MCX precolumns, 1000 ⁇ and 100 000 ⁇ separation columns filled with sulfonated styrenedivinylbenzene copolymer matrix.
- Isocratic run program is used. The run time is 45 minutes. The injection volume is 50 ⁇ l. The flux is 0.5 ml per minute. The temperature is 25 °C.
- Mn number average molecular weight
- Mw weight average molecular weight
- Mp peak molecular weight
- PDI polydispersity index
- the number average molecular weight (Mn) of lignin is 700 - 4000, preferably 800 - 3000, and more preferably 1000 - 2500.
- the polydispersity of lignin is 1.0 - 7, preferably 1.2 - 6, and more preferably 1.4 - 4.5.
- the normalized radical scavenger index (NRSI) of lignin is 0.01 - 20, preferably 0.05 - 10, and more preferably 0.1-6.
- the antioxidant activity of extracts can be evaluated using DPPH-method in methanol extracts.
- the basis of the radical scavenging method is described in Malterud et al. (Pharmacol. Toxicol. 1996, 78: 111-116 ). The method is based on the ability of extracts and pure components to react with 1,1,-diphenylpicryl-2-hydrazylradical (DPPH•)-molecules when DPPH loses its radical characteristic.
- RSI radio scavenging index
- the dry solids content of lignin is below 98 %, preferably 40 - 80 %, and more preferably 50 - 70 %.
- the dry solids content can be measured by drying a lignin sample of 1 - 5 g at a temperature of 60 °C or above in a vacuum oven for four hours.
- the lignin has an amount of 0.1 - 6 mmol, preferably 0.3 - 3.5 mmol of aliphatic hydroxyl groups per gram of dry lignin.
- the lignin has an amount of 0.1 - 5 mmol, preferably 1.5 - 4.5 mmol of phenolic hydroxyl groups per gram of dry lignin.
- Aliphatic and phenolic hydroxyl groups can be determined by characterizing a lignin sample with 31P NMR spectroscopy after phosphitylation and after which the aliphatic hydroxyl groups can be quantitatively determined.
- 31P NMR analyses 40 mg of lignin can be weighted and dissolved in 300 ⁇ l of N,N-dimethylformamide.
- Bruker 500 MHz NMR spectrometer can be used for the measurement.
- 31P NMR measurement is based on the method developed by Grannata and Argyropoulos ( Grannata A. and Argyropoulos D.S., 2-Chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane, a reagent for the accurate determination of the uncondensed and condensed phenolic moieties in lignins. J. Agric. Food Chem, 1995, 43:1538-1544 ). The results are calculated as mmol/g lignin.
- the lignin is selected from a group consisting of kraft lignin, steam explosion lignin, biorefinery lignin, supercritical separation lignin, hydrolysis lignin, flash precipitated lignin, biomass originating lignin, lignin from alkaline pulping process, lignin from soda process, lignin from organosolv pulping and combinations thereof.
- the lignin is wood based lignin. The lignin can originate from softwood, hardwood, annual plants or from a combination thereof.
- Different lignin components may have different properties, e.g. molecular weight, molar mass, polydispersity, hemicellulose and extractive contents and compositions.
- kraft lignin is to be understood in this specification, unless otherwise stated, lignin that originates from kraft black liquor.
- Black liquor is an alkaline aqueous solution of lignin residues, hemicellulose, and inorganic chemicals used in a kraft pulping process.
- the black liquor from the pulping process comprises components originating from different softwood and hardwood species in various proportions.
- Lignin can be separated from the black liquor by different techniques including e.g . precipitation and filtration. Lignin usually begins precipitating at pH values below 11 - 12. Different pH values can be used in order to precipitate lignin fractions with different properties. These lignin fractions differ from each other by molecular weight distribution, e.g .
- the molar mass of lignin precipitated at a higher pH value is higher than the molar mass of lignin precipitated at a lower pH value. Further, the molecular weight distribution of lignin fraction precipitated at a lower pH value is wider than of lignin fraction precipitated at a higher pH value.
- the precipitated lignin can be purified from inorganic impurities, hemicellulose and wood extractives using acidic washing steps. Further purification can be achieved by filtration.
- the lignin is flash precipitated lignin.
- flash precipitated lignin should be understood in this specification as lignin that has been precipitated from black liquor in a continuous process by decreasing the pH of a black liquor flow, under the influence of an over pressure of 200 - 1000 kPa, down to the precipitation level of lignin using a carbon dioxide based acidifying agent, preferably carbon dioxide, and by suddenly releasing the pressure for precipitating lignin.
- the method for producing flash precipitated lignin is disclosed in patent application FI 20106073 .
- the residence time in the above method is under 300 s.
- the flash precipitated lignin particles having a particle diameter of less than 2 ⁇ m, form agglomerates, which can be separated from black liquor using e.g. filtration.
- the advantage of the flash precipitated lignin is its higher reactivity compared to normal kraft lignin.
- the flash precipitated lignin can be purified and/or activated if needed for the further processing.
- the lignin is separated from pure biomass.
- the separation process can begin with liquidizing the biomass with strong alkali or strong acid followed by a neutralization process. After the alkali treatment the lignin can be precipitated in a similar manner as presented above.
- the separation of lignin from biomass comprises a step of enzyme treatment. The enzyme treatment modifies the lignin to be extracted from biomass. Lignin separated from pure biomass is sulphur-free and thus valuable in further processing.
- the lignin is steam explosion lignin.
- Steam explosion is a pulping and extraction technique that can be applied to wood and other fibrous organic material.
- biorefinery lignin is to be understood in this specification, unless otherwise stated, lignin that can be recovered from a refining facility or process where biomass is converted into fuel, chemicals and other materials.
- supercritical separation lignin is to be understood in this specification, unless otherwise stated, lignin that can be recovered from biomass using supercritical fluid separation or extraction technique.
- Supercritical conditions correspond to the temperature and pressure above the critical point for a given substance. In supercritical conditions, distinct liquid and gas phases do not exist.
- Supercritical water or liquid extraction is a method of decomposing and converting biomass into cellulosic sugar by employing water or liquid under supercritical conditions. The water or liquid, acting as a solvent, extracts sugars from cellulose plant matter and lignin remains as a solid particle.
- the lignin is hydrolysis lignin.
- Hydrolysed lignin can be recovered from paper-pulp or wood-chemical processes.
- the lignin originates from an organosolv process.
- Organosolv is a pulping technique that uses an organic solvent to solubilize lignin and hemicellulose.
- the pH value of the composition in step a) and in step b) can be selected depending on the final application of the binder composition to be produced.
- the pH of the composition is kept, in step a), at the pH value of 4 - 10, preferably at the pH value of 4.5 - 9.5, more preferably at the pH value of 5 - 9, and even more preferably at the pH value of 5.5 - 8.5.
- the pH of the composition is kept, in step b), preferably at the pH value of 6 - 10, more preferably at the pH value of 6.5 - 9.5, and even more preferably at the pH value of 7 - 9.
- These kinds of pH ranges may be used in step a) and in step b) when producing a binder composition for high-pressure laminates.
- the pH of the composition is kept, in step a), at the pH value of 4 - 14, preferably at the pH value of 7 - 13.5, and more preferably at the pH value of 8.5 - 13.
- the pH of the composition is kept, in step b), preferably at the pH value of 7 - 14, more preferably at the pH value of 9 - 13.5, and even more preferably at the pH value of 10 - 13.
- These kinds of pH ranges may be used in step a) and in step b) when producing a binder composition for plywood.
- step b) is carried out for 10 minutes - 2 hours, preferably for 1 hour - 1.5 hours.
- the alkali is sodium hydroxide, potassium hydroxide, or a combination thereof.
- the concentration of alkali is 0.1 - 11 weight-%, and preferably 0.5 - 9 weight-% based on the total weight of the composition in step b). In one embodiment of the present invention the concentration of alkali is 0.1 - 5 weight-%, and preferably 0.5 - 2 weight-% based on the total weight of the composition in step b). In one embodiment of the present invention the concentration of alkali is 3 - 15weight-%, preferably 5 - 12, and more preferably 6 - 10 weight-% based on the total weight of the composition in step b).
- the concentration of lignin in step a) is 10 - 40 weight-%, and preferably 20 - 30 weight-% based on the total weight of the composition in step a).
- the concentration of the compound selected from the class of phenols in step a) is 10 - 50 weight-%, preferably 20 - 50 weight-%, and more preferably 20 - 45 weight-% based on the total weight of the composition in step a).
- the step of heating the formed composition in step c) is carried out for polymerizing the reactant components, i.e. lignin, the compound selected from the class of phenols, and the crosslinking agent, such that the viscosity of the binder composition is increased.
- the heating can be continued until a predetermined viscosity value is formed.
- the predetermined viscosity value of the final binder composition may vary depending on the specific application where the binder composition is to be used.
- the predetermined viscosity value of the final binder composition is at least 40 cP, preferably at least 50 cP, and more preferably at least 80 cP. In one embodiment of the present invention the predetermined viscosity value of the final binder composition is at least 40 but not more than 250 cP, preferably at least 50 cP but not more than 150 cP, and more preferably at least 80 but not more than 120 cP.
- the predetermined viscosity value of the final binder composition is at least 250 cP, preferably at least 300 cP, and more preferably at least 500 cP. In one embodiment of the present invention the predetermined viscosity value of the final binder composition is at least 250 cP but not more than 1500 cP, preferably at least 300 cP but not more than 1200 cP, and more preferably at least 500 but not more than 1000 cP.
- the viscosity is measured at 25 °C using a rotary viscometer.
- step c) comprises heating the composition preferably at a temperature of 65 - 95 °C, more preferably at a temperature of 70 - 90 °C, and even more preferably at a temperature of 75 - 85 °C.
- the crosslinking agent is selected from a group consisting of an aldehyde, a derivative of an aldehyde, an aldehyde forming compound and combinations thereof.
- the derivative of an aldehyde is hexamethylenetetramine, paraformaldehyde or trioxane.
- the crosslinking agent is selected from a group consisting of an aromatic aldehyde, glyoxal, furfuryl alcohol, caprolactam and glycol compounds.
- the aldehyde can be formaldehyde.
- the aromatic aldehyde can be furfuryl aldehyde.
- the crosslinking agent is an aldehyde, and preferably formaldehyde, paraformaldehyde or a combination thereof.
- step c) is carried out in the presence of a catalyst.
- the catalyst is selected from a group consisting of sodium hydroxide, potassium hydroxide and any mixture thereof.
- the pH of the composition is kept, in step c), preferably at a pH value of 6 - 10, more preferably at the pH value of 6.5 - 9.5, and even more preferably at the pH value of 7 - 9.
- the pH of the composition is kept, in step c), preferably at the pH value of 7 - 14, more preferably at the pH value of 9 - 13.5, and even more preferably at the pH value of 10 - 13.
- the present invention further relates to the use of lignin treated by the method according to the present invention for the production of a binder composition.
- the present invention further relates to a binder composition obtainable by the method according to the present invention.
- the present invention further relates to an adhesive composition comprising the binder composition according to the present invention.
- the adhesive composition can further comprise one or more adhesive components selected from a group consisting of other binders, extenders, additives, catalysts and fillers.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept in step a) at a value of 4 - 10 and in step b) at a value of 6 - 10, for producing a laminate, and preferably a high-pressure laminate.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept in step c) at a value of 6 - 10 for producing a laminate, and preferably a high-pressure laminate.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept in step a) at a value of 4 - 10 and in step b) at a value of 6 - 10, for producing a foundry material, a protective coating, a friction material, an abrasive material, glass wool, rock wool, a prepreg, a shuttering film, an overlay, a molding component or a fiber reinforced composite.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept in step c) at a value of 6 - 10, for producing a foundry material, a protective coating, a friction material, an abrasive material, glass wool, rock wool, a prepreg, a shuttering film, an overlay, a molding component or a fiber reinforced composite.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept in step a) at a value of 4 - 14 and in step b) at a value of 7 - 14, for producing a particle board, an oriented strand board, a chip board, an intrallam, a gluelam, a hardboard, a waferboard, a fiber board, a, plywood, or a wood adhesive.
- the present invention further relates to the use of a binder composition obtainable by the method according to the present invention, wherein the pH of the composition is kept, in step c), preferably at the pH value of 7 - 14, for producing a particle board, an oriented strand board, a chip board, an intrallam, a gluelam, a hardboard, a waferboard, a fiber board, a, plywood, or a wood adhesive.
- inventions described hereinbefore may be used in any combination with each other. Several of the embodiments may be combined together to form a further embodiment of the invention.
- a method, a composition or a use, to which the invention is related, may comprise at least one of the embodiments of the invention described hereinbefore.
- An advantage of the method according to the present invention is that the time needed for dissolving lignin into the aqueous composition is reduced when using the specified temperature.
- An advantage of the method according to the present invention is that it is possible to treat lignin in a manner that enables the production of a low pH binder composition, i.e. a binder composition with a neutral or acidic pH range.
- the lignin treated with the method according to the present invention has an open structure making it more reactive whereby the production of low pH binder composition is possible with lignin.
- An advantage of the present invention is that a bio-based binder composition suitable to be used for the production of high-pressure laminates can be produced by the method according to the present invention.
- An advantage of the present invention is that a more environmentally friendly binder composition can be produced for high-pressure laminates.
- Figure 1 illustrates a method according to one embodiment of the present invention for treating lignin.
- the source of lignin is chosen. Also the other components and their amounts to be used in the method according to the present invention are selected. If needed, the components used in the method of Fig. 1 can be pre-treated to be suitable for the lignin treatment processes.
- Step a) comprises dissolving lignin into an aqueous composition containing a compound selected from the class of phenols and alkali.
- the alkali is a hydroxide of an alkali metal.
- the temperature of the composition is kept at 40 - 85 °C.
- the composition formed in step a) is heated at a temperature, which is higher than the temperature of the composition in step a), with the proviso that the temperature of the composition does not exceed 100 °C, while keeping the pH of the composition at a pH value of 6 - 14.
- the lignin is allowed to react with the compounds selected from the class of phenols and the alkali.
- Step a) and step b) result in the lignin being suitable for further production steps and being suitable for being covalently bonded with e.g. formaldehyde.
- Figure 2 illustrates a method according to one embodiment of the present invention for producing a binder composition.
- Fig. 2 begins with treating lignin in step a) and step b) in accordance with the method described above for Fig. 1 .
- step b) the composition formed in step b) is mixed with a crosslinking agent in step c).
- the formed composition is heated at a temperature of 60 - 100 °C for allowing the reactant components, i.e. the lignin, the compound selected from the class of phenols and the crosslinking agent, in the composition to react with each other for forming a binder composition.
- the pH of the composition is kept, in step c), at a pH value of 6 - 14. The heating of the composition is continued until a desired, predetermined, viscosity value of the binder composition is reached.
- step c) a binder composition having desired properties and especially having high ratio of bio-based components is produced.
- This binder composition can be used as such for gluing applications or it can be further processed with other adhesive components for producing an adhesive composition.
- EXAMPLE 1 Activating lignin and the use of activated lignin for the production of a binder composition.
- lignin was firstly treated with phenol and sodium hydroxide. The following components and their amounts were used: Material MW Concentration Mass, g NaOH 40 50 % 266 Water 18 0 % 500 Lignin 180 68.5 % 602 Phenol 94 90 % 458
- lignin was mixed with water and then sodium hydroxide was added to the formed composition.
- the pH was increased to a value of about 13.8.
- the phenol was added.
- the temperature of the composition was kept at about 45 °C while dissolving lignin into the composition.
- the temperature was increased to about 75 °C and the heating was continued for about 1 h.
- the pH of the composition was kept at a value of 10 - 11 during the heating of the composition.
- Lignin treated as above described was thereafter used for producing a binder composition.
- 490 g of formaldehyde was added to the above formed composition in a stepwise manner.
- the formed composition was heated at a temperature of about 83-85 °C and until the viscosity increased to 315 cP as measured at 25 °C using a rotary viscometer.
- MR stands for molecular ratio, i.e. the ratio of mol(formaldehyde)/mol(phenol + lignin) .
- the gel time was determined by adding 0.5 ml of the sample in a test tube with a rod. The sample was not to be stirred. The test tube was heated to 100 °C in a glycerin or oil bath without mixing. The time until the sample became pasty (melted solid) was measured after which the measurement was completed.
- the solids content is on a suitable level for the binder composition to be used for wood panel products such as plywood or oriented strand boards.
- EXAMPLE 2 Activating lignin and the use of activated lignin for the production of a binder composition.
- lignin was firstly treated with phenol and sodium hydroxide. The following components and their amounts were used: Material MW Concentration Mass, g NaOH 40 50 % 66.0 Water 18 0% 728.0 Lignin 180 70 % 879.0 Phenol 94 90 % 684.0
- an aqueous composition was formed by mixing water, phenol and sodium hydroxide. To this aqueous composition, lignin was added. The temperature of the composition was kept at about 70 - 75 °C while dissolving lignin into the composition.
- the temperature was increased to about 90 °C and the heating was continued for about 10 minutes.
- the pH of the composition was kept at a value of 8 - 8.3 during the heating of the composition.
- Lignin treated as above described was thereafter used for producing a binder composition.
- 568 g of paraformaldehyde was added to the above formed composition in a stepwise manner.
- the formed composition was heated at a temperature of about 78 - 90 °C and until the viscosity was about 94 cP as measured at 25 °C using a rotary viscometer.
- MR molecular ratio, i.e. the ratio of mol(paraformaldehyde)/mol(phenol + lignin).
- the gel time was determined by adding 0.5 ml of the sample in a test tube with a rod. The sample was not to be stirred. The test tube was heated to 100 °C in a glycerin or oil bath without mixing. The time until the sample became pasty (melted solid) was measured after which the measurement was completed.
- the solids content is on a suitable level for the binder composition to be used for laminates such as high-pressure laminates and for ovelays.
- the water tolerance is better than for traditionally used phenol-formaldehyde binder compositions used for laminates such as high-pressure laminates and for shuttering films.
- the binder composition produced in Example 1 was used for the production of an adhesive composition.
- the binder composition was mixed with extenders, fillers, catalysts, additives, as examples of which e.g. starch, wood flour and hardener (e.g . tannin or carbonates) can be mentioned, thus forming the adhesive composition.
- extenders, fillers, catalysts, additives as examples of which e.g. starch, wood flour and hardener (e.g . tannin or carbonates) can be mentioned, thus forming the adhesive composition.
- wood veneers having the thickness of below 1.5 mm were glued together with the adhesive composition produced for producing a 9-plywood. After 8 min, cold-press panels were hot-pressed at 130 °C. Results showed that the gluing effect was sufficiently good for gluing wood veneers.
- the binder composition produced in Example 2 was used for the production of shuttering films.
- Kraft papers with a weight of 42 g/m 2 were impregnated with the binder composition and dried at 130 °C.
- the impregnated paper was pressed on one side of plywood at 145 °C for 6 min. Results showed that the shuttering film was performing sufficiently good; no blisters on the surface or delamination were observed.
- lignin was firstly treated with phenol and sodium hydroxide. The following components and their amounts were used: Material MW Concentration Mass, g NaOH 40 50 % 66.0 Water 18 0 % 250.0 Lignin 180 70 % 879.0 Phenol 94 90 % 684.0
- an aqueous composition was formed by mixing water, phenol and sodium hydroxide. To this aqueous composition, lignin was added. The temperature of the composition was kept at about 70 - 75 °C while dissolving lignin into the composition.
- the temperature was increased to about 90 °C and the heating was continued for about 10 minutes.
- the pH of the composition was kept at a value of 8 - 8.3 during the heating of the composition.
- Lignin treated as above described was thereafter used for producing a binder composition.
- 568 g of paraformaldehyde was added to the above formed composition in a stepwise manner.
- the formed composition was heated at a temperature of about 76 °C until the viscosity was about 930 cP as measured at 25 °C using a rotary viscometer.
- MR molecular ratio, i.e. the ratio of mol(paraformaldehyde)/mol(phenol + lignin).
- the gel time was determined by adding 0.5 ml of the sample in a test tube with a rod. The sample was not to be stirred. The test tube was heated to 130 °C in a glycerin or oil bath without mixing. The time until the sample became pasty (melted solid) was measured after which the measurement was completed.
- the formed binder composition was used to produce a pre-preg by adding to the cooled binder composition firstly about 2 weight-%, based on the weight of the binder composition, of diethylene glycol (DEG) and then below 1 weight-%, based on the weight of the binder composition, of glycolic acid.
- DEG diethylene glycol
- rock wool was formed. Firstly lignin was treated with phenol and sodium hydroxide. The following components and their amounts were used: Material MW Concentration Mass, g NaOH 40 50 % 111.7 Water 18 0 % 227.2 Lignin 180 70 % 171.9 Phenol 94 90 % 534.5
- Borax is a commonly used product in rock wool to enhance fire resistance and to act as an anti-moulding agent. Borax does not take part in the reactions where lignin is dissolved and allowed to react with phenol and NaOH. Borax can be added to the composition in the beginning of the process to ensure even distribution in the polymer matrix but it could also be added only after the binder composition formation.
- the temperature of the composition was kept at about 42 °C and the pH of the composition was about 9 - 10 while allowing lignin to dissolve.
- the temperature of the composition was increased up to 50 °C and the lignin was allowed to react with phenol and sodium hydroxide in the composition for about an hour.
- the pH of the composition was about 9.3.
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Claims (15)
- Verfahren zur Behandlung von Lignin, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:a) Lösen von Lignin in einer wässrigen Zusammensetzung, die eine Verbindung aus der Klasse der Phenole und Alkali enthält, während die Temperatur der Zusammensetzung bei 40 - 85 °C gehalten wird, worin das Alkali ein Hydroxid eines Alkalimetalls umfasst und der pH-Wert der Zusammensetzung im Schritt a) bei einem pH-Wert von 4 - 14 gehalten wird; undb) Erwärmen der in Schritt a) gebildeten Zusammensetzung bei einer Temperatur, die höher als die Temperatur der Zusammensetzung in Schritt a) ist, mit der Maßgabe, dass die Temperatur der Zusammensetzung 100 °C nicht übersteigt, während der pH-Wert der Zusammensetzung bei einem pH-Wert von 6 - 14 gehalten wird.
- Verfahren gemäß Anspruch 1, worin die Verbindung aus der Klasse der Phenole aus einer Gruppe ausgewählt ist, die aus Phenol, Kresol, Resorcinol und Kombinationen davon besteht.
- Verfahren gemäß einem der Ansprüche 1 - 2, worin die Temperatur der Zusammensetzung in Schritt a) bei einer Temperatur von 65 - 80 °C und bevorzugt bei einer Temperatur von 70 - 75 °C gehalten wird und/oder
worin Schritt b) das Erwärmen der Zusammensetzung bei einer Temperatur umfasst, die mindestens 5 °C, vorzugsweise mindestens 10 °C und bevorzugter mindestens 20 °C höher ist als die Temperatur der Zusammensetzung in Schritt a). - Verfahren gemäß einem der Ansprüche 1 - 3, worin der pH-Wert der Zusammensetzung in Schritt a) bei einem pH-Wert von 4 - 10, vorzugsweise bei einem pH-Wert von 4,5 - 9,5, bevorzugter bei einem pH-Wert von 5 - 9 und noch bevorzugter einem pH-Wert von 5,5 - 8,5 gehalten wird, und optional worin der pH der Zusammensetzung in Schritt b) vorzugsweise bei einem pH-Wert von 6 - 10, bevorzugter bei einem pH-Wert von 6,5 - 9,5 und noch bevorzugter einem pH-Wert von 7 - 9 gehalten wird; oder
worin der pH der Zusammensetzung in Schritt a) bei einem pH-Wert von 7 - 13,5, vorzugsweise bei einem pH-Wert von 8,5 - 13 gehalten wird, und optional worin der pH-Wert der Zusammensetzung in Schritt b) bei einem pH-Wert von 7 - 14, vorzugsweise bei einem pH-Wert von 9 - 13,5, bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird. - Verfahren gemäß einem der Ansprüche 1 - 4, worin die Zusammensetzung in Schritt b) bei einer Temperatur von 60 - 100 °C, vorzugsweise bei einer Temperatur von 70 - 95 °C und bevorzugter bei einer Temperatur von 75 - 90 ° C erwärmt wird.
- Verfahren zur Herstellung einer Bindemittelzusammensetzung, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:a) Lösen von Lignin in einer wässrigen Zusammensetzung, die eine Verbindung aus der Klasse der Phenole und Alkali enthält, während die Temperatur der Zusammensetzung bei 40 - 85 °C gehalten wird, worin das Alkali ein Hydroxid eines Alkalimetalls umfasst und der pH-Wert der Zusammensetzung im Schritt a) bei einem pH-Wert von 4 - 14 gehalten wird;b) Erwärmen der in Schritt a) gebildeten Zusammensetzung bei einer Temperatur, die höher als die Temperatur der Zusammensetzung in Schritt a) ist, mit der Maßgabe, dass die Temperatur der Zusammensetzung 100 °C nicht übersteigt, während der pH-Wert der Zusammensetzung bei einem pH-Wert von 6 - 14 gehalten wird; undc) Mischen der in Schritt b) gebildeten Zusammensetzung mit einem Vernetzungsmittel und das Erwärmen der Zusammensetzung auf eine Temperatur von 60 - 100°C, während der pH-Wert der Zusammensetzung bei einem pH-Wert von 6 - 14 gehalten wird.
- Verfahren gemäß Anspruch 6, worin Schritt b) das Erwärmen der Zusammensetzung bei einer Temperatur umfasst, die mindestens 5 °C, vorzugsweise mindestens 10 °C und bevorzugter mindestens 20 °C höher ist als die Temperatur der Zusammensetzung in Schritt a); und/oder
worin Schritt c) das Erwärmen der Zusammensetzung vorzugsweise bei einer Temperatur von 65 - 95°C, bevorzugter bei einer Temperatur von 70 - 90 °C und noch bevorzugter bei einer Temperatur von 75 - 85 °C umfasst. - Verfahren gemäß Anspruch 6 oder 7, worin der pH-Wert der Zusammensetzung in Schritt a) bei einem pH-Wert von 4 - 10, vorzugsweise bei einem pH-Wert von 4,5 - 9,5, bevorzugter bei einem pH-Wert von 5 - 9 und noch bevorzugter bei einem pH-Wert von 5,5 - 8,5 gehalten wird, und optional worin der pH-Wert der Zusammensetzung in Schritt b) vorzugsweise bei einem pH-Wert von 6 - 10, bevorzugter bei einem pH-Wert von 6,5 - 9,5 und noch bevorzugter einem pH-Wert von 7 - 9 gehalten wird; oder
worin der pH-Wert der Zusammensetzung in Schritt a) bei einem pH-Wert von 7 - 13,5, vorzugsweise bei einem pH-Wert von 8,5 - 13 gehalten wird, und optional worin der pH-Wert der Zusammensetzung in Schritt b) bei einem pH-Wert von 7 - 14, vorzugsweise bei einem pH-Wert von 9 - 13,5 und bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird. - Verfahren gemäß einem der Ansprüche 6 - 8, worin der pH-Wert der Zusammensetzung in Schritt c) bei einem pH-Wert von 6 - 10, vorzugsweise bei einem pH-Wert von 6,5 - 9,5 und bevorzugter bei einem pH-Wert von 7 - 9 gehalten wird; oder
worin der pH-Wert der Zusammensetzung in Schritt c) bei einem pH-Wert von 7 - 14, bevorzugter bei einem pH-Wert von 9 - 13,5 und noch bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird. - Verfahren gemäß einem der Ansprüche 6 - 9, worin das Vernetzungsmittel ein Aldehyd und vorzugsweise Formaldehyd, Paraformaldehyd oder eine Kombination davon ist.
- Verwendung von nach dem Verfahren gemäß einem der Ansprüche 1 - 5 behandeltem Lignin zur Herstellung einer Bindemittelzusammensetzung.
- Bindemittelzusammensetzung, erhältlich durch das Verfahren gemäß einem der Ansprüche 6 - 10.
- Klebstoffzusammensetzung, umfassend die Bindemittelzusammensetzung gemäß Anspruch 12.
- Verwendung einer Bindemittelzusammensetzung, erhältlich durch das Verfahren gemäß Anspruch 8, worin der pH-Wert der Zusammensetzung in Schritt b) bei einem pH-Wert von 6 - 10, vorzugsweise bei einem pH-Wert von 6,5 - 9,5 und bevorzugter bei einem pH-Wert von 7 - 9 gehalten wird, oder durch das Verfahren gemäß Anspruch 9, worin der pH-Wert der Zusammensetzung in Schritt c) bei einem pH-Wert von 7 - 14, bevorzugter bei einem pH-Wert von 9 - 13,5 und noch bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird,
zur Herstellung eines Laminats und vorzugsweise eines Hochdrucklaminats; oder zur Herstellung eines Gießereimaterials, einer Schutzbeschichtung, eines Reibungsmaterials, eines Schleifmaterials, von Glaswolle, von Steinwolle, eines Prepregs, einer Schalungsfolie, einer Auflage, einer Formkomponente oder eines faserverstärkten Verbundstoffs. - Verwendung einer Bindemittelzusammensetzung, erhältlich durch das Verfahren gemäß Anspruch 8, worin der pH-Wert der Zusammensetzung in Schritt b) bei einem pH-Wert von 7 - 14, vorzugsweise bei einem pH-Wert von 9 - 13,5 und bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird, oder durch das Verfahren gemäß Anspruch 9, worin der pH-Wert der Zusammensetzung in Schritt c) bei einem pH-Wert von 7 - 14, bevorzugter bei einem pH-Wert von 9 - 13,5 und noch bevorzugter bei einem pH-Wert von 10 - 13 gehalten wird,
zur Herstellung einer Spanplatte ["particle board"], einer "oriented strand board"-Platte, einer Spanplatte ["chip board"], eines Intralams, eines Leimholzes, einer Hartplatte, einer "waferboard"-Platte, einer Faserplatte, eines Sperrholzes oder eines Holzklebstoffs.
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FI20136178A FI126737B (en) | 2013-11-26 | 2013-11-26 | Process for treating lignin and preparing a binder composition |
PCT/FI2014/050902 WO2015079107A1 (en) | 2013-11-26 | 2014-11-25 | A method for treating lignin and for producing a binder composition |
EP14809072.3A EP3074410B1 (de) | 2013-11-26 | 2014-11-25 | Verfahren zur behandlung von lignin und zur herstellung einer bindemittelzusammensetzung |
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EP14809072.3A Division EP3074410B1 (de) | 2013-11-26 | 2014-11-25 | Verfahren zur behandlung von lignin und zur herstellung einer bindemittelzusammensetzung |
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SI3783008T1 (sl) | 2023-11-30 |
BR112016009537B1 (pt) | 2021-05-25 |
WO2015079107A1 (en) | 2015-06-04 |
LT3783008T (lt) | 2023-11-10 |
DE202014011173U1 (de) | 2018-05-16 |
JP2016539216A (ja) | 2016-12-15 |
JP6538674B2 (ja) | 2019-07-03 |
PT3783008T (pt) | 2023-10-19 |
ES2962503T3 (es) | 2024-03-19 |
CN111647171A (zh) | 2020-09-11 |
CA2927313A1 (en) | 2015-06-04 |
EP3074410A1 (de) | 2016-10-05 |
FI20136178A (fi) | 2015-05-27 |
US10301437B2 (en) | 2019-05-28 |
US20160257791A1 (en) | 2016-09-08 |
EP3074410B1 (de) | 2020-11-11 |
PL3783008T3 (pl) | 2024-01-29 |
EP3783008A1 (de) | 2021-02-24 |
CN111647171B (zh) | 2022-05-17 |
CA2927313C (en) | 2018-04-24 |
FI126737B (en) | 2017-04-28 |
FI3783008T3 (fi) | 2023-12-18 |
CN105793272A (zh) | 2016-07-20 |
FI12008U1 (fi) | 2018-03-23 |
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